L31 电声器件 标准查询与下载

ASA S3.46-1998 助听器真实耳朵动作特征测量方法

Methods of Measurement of Real-Ear Performance Characteristics of Hearing Aids

Methods of Measurement of Real-Ear Performance Characteristics of Hearing Aids

ASTM E1477-98a 使用集成球形反射计测定音响材料反光因素的试验方法

1.1 This test method covers the measurement of the luminous reflectance factor of acoustical materials for use in predicting the levels of room illumination. 1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Test Method for Luminous Reflectance Factor of Acoustical Materials by Use of Integrating-Sphere Reflectometers

ANSI/CEA 426-B-1998 全频带扬声器功率额定值

This standard defines test methods and criteria of acceptability for testing the performance of a loudspeaker or loudspeaker system designed for consumer use within defined limits in the areas of power compression, harmonic distortion, and accelerated life testing, when operated at or below the optimum amplifier power.

Loudspeakers, Optimum Amplifier Power

NF C97-622/A2:1997 NF EN 60118-2-1996的修改件2

Modification 2 of NF EN 60118-2-1996

BS EN 60118-12:1997 助听器 电连接器系统的尺寸

Applies to plugs and connector systems for hearing aids and specifies the dimensions and their tolerances essential for ensuring interchangeability.

Hearing aids. Dimensions of electrical connector systems

IEC 60118-13:1997 助听器 第13部分:电磁兼容性(EMC)

Hearing aids - Part 13: Electromagnetic compatibility (EMC)

IEC 60118-2:1983/AMD2:1997 助听器 第2部分:自动增益控制电路的助听器 修改2

This standard is Hearing aids - Part 2: Hearing aids with automatic gain control circuits; Amendment 2.

Hearing aids - Part 2: Hearing aids with automatic gain control circuits; Amendment 2

DIN EN 60118-12:1997 助听器.第12部分:电子连接器系统尺寸

The document applies to plugs and connector systems for hearing aids and specifies the dimensions and their tolerances essential for ensuring interchangeability.

Hearing aids - Part 12: Dimensions of electrical connector systems (IEC 60118-12:1996); German version EN 60118-12:1996

ANSI S12.6-1997 听力保护器的真耳听觉衰减的测量方法

This standard specifies laboratory-based procedures for measuring, analyzing, and reporting the noise-reducing capabilities of hearing protection devices. The methods consist of psychophysical tests conducted on human subjects to determine real-ear atten

Methods for measuring the real-ear attenuation of hearing protectors

ANSI S3.46-1997 助听器真耳性能特性的测量方法

This standard provides definitions for terms used in the measurement of real-ear performance characteristics of hearing aids, provides procedural and reporting guidelines and identifies essential characteristics to be reported by the manufacturer of equi

Methods of Measurement of Real-Ear Performance Characteristics of Hearing Aids

BS EN 60118-2:1996 助听器.第2部分:带自动增益控制电路助听器电声特性测量方法

1 This standard applies to the hearing aids of any type with automatic gain control (AGC) circuits. This standard gives uniform methods for specifying dynamic and static performance characteristics of hearing aids with AGC circuits together with the relevant methods of measurement for these charac-teristics. This standard is confined to a description of the different characteristics and the relevant methods of measurement. It does not attempt to specify performance requirements. 2 This standard includes devices which have compression and/or limiting properties with respect to the envelope of the input signal. Devices which control the long-term average output level are also included. a) AGC is employed to obtain compression, or the reduction of the dynamic range of the sound at the output, with the object of preserving the integrity of the input waveform. b) AGC circuits instead of clipping devices are often used for limiting purposes. A limiting effect occurs when the input/output characteristic flattens out at higher input levels. Limiting action is mainly used as a means of preventing excessive output sound from the hearing aid from reaching the listener's ear. 3 This standard does not include: a) Expanders. b) Clipping devices, which cut off the signal peaks above a certain level; such devices differ basically from AGC circuits, which, in a steady state, tend to preserve the waveform of the input signal. Note. - An AGC circuit with very short recovery time may cause considerable distortion, especially in the low-frequency range. This should be given special attention.

Hearing aids - Methods for measurement of electroacoustical characteristics of hearing aids with automatic gain control circuits

IEC 60118-12:1996 助听器 第12部分:电连接器系统的尺寸

This International Standard applies to plugs and connector systems for hearing aids and specifies the dimensions and their tolerances essential for ensuring interchangeability.

Hearing aids - Part 12: Dimensions of electrical connector systems

ITU-T P.58-1996 通话计时用人头和躯干模拟器

This Recommendation specifies the electroacousticai characteristics of Head and Torso Simulators (HATS) to be used for telephonometric measurements. Both the sound generation and sound pick-up characteristics of these devices are specified.

Head and Torso Simulator for Telephonometry - Series P: Telephone Transmission Quality; Objective Measuring Apparatus Study Group 12

BS EN 61094-4:1996 测量麦克风规范 工作标准麦克风的规格

This part of IEC 1094 is applicable to working standard microphones. It specifies mechanical dimensions and certain electroacoustical characteristics for working standard microphones used in measuring systems for the determination of sound pressure to enable these microphones to be used as transfer standards in the calibration of acoustic measurement instruments. It establishes a system for classifying working standard microphones into a number of types according to their dimensions and properties in order to facilitate the specification of measurement systems, the calibration of measuring systems and microphones by sound calibrators, and the interchangeability of microphones in given measuring and calibration systems. It does not specify the transduction principle by which working standard microphones operate.

Specification for measurement microphones. Specifications for working standard microphones

BS EN 61094-3:1996 传声器测量规范.第3部分:用互易技术校准实验室标准传声器自由场的基本方法

This part of IEC 1094 is applicable to laboratory standard microphones meeting the requirements of IEC 1094-1. The principles of the method are applicable to other types of microphones. In particular, microphones which fulfil the requirements of IEC 1094-1, when fitted with a special adaptor, may also be calibrated according to this standard when the adaptor is removed. This part of IEC 1094 specifies a primary method of determining the free-field sensitivity so as to establish a reproducible and accurate basis for the measurement of sound pressure under free-field conditions. This part of IEC 1094 is intended for use by laboratories with highly experienced staff and specialized equipment.

Specification for measurement microphones - Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique

NF C97-622:1996 助听器.第2部分:带自动增益控制电路的助听器

Hearing aids. Part 2 : hearing aids with automatic gain control circuits.

NF C97-333:1996 扩音器的测量.第3部分:用互换技术对实验室标准扩音器进行自由场校准的基本方法

Measurement microphones. Part 3 : primary method for free-field calibration of laboratory standard microphones by the reciprocity technique.

NF C97-627/A1:1996 NF EN 60118-7-1993的修改件1

Modification 1 of NF EN 60118-7-1993

NF C97-620/A1:1996 NF EN 60118-0-1993的修改件1

Modification 1 of NF EN 60118-0-1993

ANSI/EIA 636:1996 推荐的扬声器安全规程

Guides manufacturers in the testing of loudspeakers for the existence of specific potential hazards. The guidelines in this document consist of loudspeaker specifications and tests that relate to specific safety issues only.

Recommended Loudspeaker Safety Practices